Second progress report on the utilization evaluation of an aid hand operated water pump / 
prepared by the U. S. Agency for International Development ; by Phillip W. Potts [y otros] 
 - 127 páginas 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Maquinaria de bombeo
<br/><br/><label>LC Class. No.: </label>TJ903  / E83